Abstract: Provided are a hot-rolled steel sheet having excellent formability and a manufacturing method therefore. The steel sheet includes: carbon (C): 0.05 to 0.17%, silicon (Si): 0.01 to 1.5%, manganese (Mn): 1.5 to 3.0%, aluminum (Al): 0.01 to 0.1%, chromium (Cr): 2.0% or less (including 0%), molybdenum (Mo): 2.0% or less (including 0%), titanium (Ti): 0.01 to 0.15%, phosphorus (P): 0.001 to 0.05%, sulfur (S): 0.0001 to 0.05%, nitrogen (N): 0.0001 to 0.02%, with a balance of Fe and other unavoidable impurities, satisfies: (1.5×[Si]+1.2×[Cr]+0.7×[Mo]+8.0×[Ti])/[C]>20 where each element refers to a weight content, and a microstructure including 70 to 90% of acicular ferrite or bainitic ferrite by area fraction, as a matrix structure, and one or more second phases among low-temperature bainite, tempered martensite, and MA phase.

Abstract: In a hydrogel mask pack having good skin-care effects, the hydrogel mask pack is formed by filling a frame with a composition for the hydrogel mask pack and immersing the frame in any one of an aqueous solution of a metal salt, alcohol or distilled water. The composition for the hydrogel mask pack is prepared by mixing an aqueous solution of fibroin and any one of alginate, cellulose or agar. The hydrogel mask pack may have superior moisturizing effects, skin-regenerative effects, mechanical strength and elasticity, and thus may be good enough to be used for a skin-care mask pack.

Abstract: A method of producing glutamic acid by culturing an amino acid auxotroph of a biologically pure strain of Bacillus methanolicus which exhibits sustained growth at 50.degree. C. using methanol as a carbon and energy source and requiring vitamin B.sub.12 and biotin is provided.